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b: =2376-376+3425-42
=2000+3383
=5383
c: =3145-145+246+4246+2347-347
=3000+2000+4492
=9492
e: =(72-72):A=0
![](https://rs.olm.vn/images/avt/0.png?1311)
a)
X x 5,2 : 4,5 = 10 ,5
X x 5,2 = 10,5 x 4,5
X x 5,2 = 47,25
X = 47,25 : 5,2
X = 945/104
b)
5/7 x X + 2/7 x X = 2/3
X x ( 5/7 + 2/7 ) = 2/3
X x 1 = 2/3
x = 2/3 : 1
x = 2/3
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a) x = 25 ;26
b) x = 0;1;2;3;4;...........;28;2930
c) x= 82; 83;84;85;86;87;88;89;90;91;92;93
d) x = 92
x = 25 ; 26
x = 0 ; 1 ; 2 ; ... ; 30
x = 82 ; ... ; 92
x = 92
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2 x (13 x 12) - 3 x (96 : 4)
= 2 x 156 - 3 x 24
= 2 x 6,5 x 24 - 3 x 24
= 13 x 24 - 3 x 24
= (13 - 3) x 24
= 10 x 24
= 240
mik nhah nhất nha
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a)
\(x-28=22\)
\(x=22+28\)
\(x=50\)
b)
\(x-55=16\)
\(x=16+55\)
\(x=71\)
c)
\(x-26=46\)
\(x=46+26\)
\(x=72\)
d)
\(x-33=18\)
\(x=18+33\)
\(x=51\)
e)
\(x-38=44\)
\(x=44+38\)
\(x=82\)
g)
\(x-5=57\)
\(x=57+5\)
\(x=62\)
a) = 50
b) = 71
c) = 72
d) = 51
e) = 82
g) = 62
k cho mk nha
![](https://rs.olm.vn/images/avt/0.png?1311)
598 x 20 + 598 x 80
= 598 x ( 20 + 80 0
= 598 x 100
= 59800
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Tính nhanh:
1,53 x 72 + 15,3 x 5,2 + 1,53 x 22 - 1,53 x 46
=1,53 x 72 + 1,53 x 52 + 1,53 x22 - 1,53 x 46
= 1,53 x ( 72 + 52 + 22 - 46)
= 1,53 x 100
= 153
Ủng hộ tui nha! :)
1,53 x 72 + 15,3 x 5,2 + 1,53 x 22 - 1,53 x 46
= 1,53 x ( 72 + 22 - 46) + 15,3 x 5,2
= 1,53 x 48 + 15,3 x 5,2
= 73,44 + 79,56
= 153